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Structural material

A technology for structural materials and raw materials, which is applied in the field of resource utilization of solid pollutants, can solve the problem of high operating costs, and achieve the effects of reducing operating costs, ensuring environmental friendliness, and eliminating peculiar smells.

Pending Publication Date: 2020-12-29
LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is a new type of soilless garbage covering material, which is composed of cement, fiber and polymer binder; the slurry formed by mixing the soilless garbage covering material with water is sprayed on the garbage dump to form a closed covering surface; A new type of garbage covering material that can be sprayed, mainly composed of bird repellent, deodorant, ordinary Portland cement, defoamer, pregelatinized starch, polyester fiber, bentonite, cellulose ether and water reducing agent; These two kinds of covering materials are used to replace loess / clay to form a closed covering surface on the surface of garbage dumps, but the basic covering materials of the two are mainly cement, polymer adhesives, etc., and the operating costs are relatively high

Method used

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Embodiment 1

[0034] A method for synergistically preparing garbage covering soil with fly ash and concentrated solution, the process comprises the following steps:

[0035] Put 70 parts of fly ash, 20 parts of bentonite, 10 parts of Portland cement, 0.5 parts of carboxymethyl cellulose, and 150 parts of concentrate into a special mixing and stirring equipment, mix evenly and vigorously stir for 10 minutes, and the obtained slurry The cured material is sprayed onto the surface of the garbage dump by special spraying equipment, and the thickness of a single spray is 30mm. After drying and curing are completed within 24 hours, it is sprayed again to cover, and this cycle is repeated 3 times to form a stable garbage covering layer.

Embodiment 2

[0037] A method for synergistically preparing garbage covering soil from fly ash and the mother liquor of the concentrated solution, the process comprises the following steps:

[0038]Put 60 parts of fly ash, 20 parts of bentonite, 20 parts of Portland cement, 1 part of carboxymethyl cellulose, 5 parts of zeolite powder, and 80 parts of concentrated liquid into the special mixing and stirring equipment, mix evenly and vigorously In 10 minutes, the obtained slurry solidified material is sprayed onto the surface of the garbage dump through a special spraying equipment, and the thickness of a single spray is 30mm. After drying and curing are completed within 48 hours, it is sprayed again to cover, and this cycle is repeated 4 times to form a stable garbage cover. Floor.

Embodiment 3

[0040] A kind of method that fly ash and concentrated solution synergistically prepare cushion soil, the process comprises the following steps:

[0041] Put 70 parts of fly ash, 15 parts of bentonite, 10 parts of Portland cement, 1 part of carboxymethyl cellulose, 0.2 parts of sodium carbonate, 0.2 parts of water glass, and 70 parts of concentrate into a special mixing and stirring equipment, and mix evenly And vigorously stir for 10min, this slurry is more viscous, carry out drying by dryer, drying time is 6h, until water content is 40wt%, carry out granulation by special granulation equipment, granulation particle diameter can be controlled in Between 2mm and 10mm, the moisture content of the whole granulation process is further reduced to below 35wt%, and the moisture content will be further reduced after natural storage, and it is ready for use.

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Abstract

The invention discloses a structural material, which comprises powder and a liquid in a solid-to-liquid ratio of 1:0.5-1.5, wherein the powder comprises the following raw materials in parts by weight:40-70 parts of fly ash, 10-20 parts of bentonite, 10-20 parts of Portland cement and 0.1-1 part of an adhesive, and the liquid is a garbage concentrated solution. The structural material provided bythe invention is environment-friendly and high in strength, can replace existing garbage covering clay, can also be used as bedding soil for road infrastructure and the like, and is high in practicability; and the preparation method has the advantages of high environmental safety, strong economic feasibility and low operation cost, and can effectively solve the problem of difficult treatment of the concentrated solution.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid pollutants, in particular to a structural material that can be used as a garbage covering layer or cushion soil. Background technique [0002] Garbage landfill is the most important way to solve domestic waste in most cities in my country at present, and 60% of urban domestic waste is disposed of by landfill. Landfilled garbage dumps will produce a large amount of leachate with high COD, ammonia nitrogen and salt due to reasons such as incomplete rainproof coverage. These leachates account for about 30%-50% of the landfill volume. The existing leachate accumulation The volume is close to 100 million tons. The leachate disposal method is mainly membrane treatment, but after the leachate is filtered through the membrane, a higher concentration of concentrated liquid (accounting for about 30% of the landfill leachate) will be produced. However, existing treatment methods such ...

Claims

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Application Information

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IPC IPC(8): C04B28/04B09B1/00C04B22/00C04B18/08
CPCB09B1/004C04B18/08C04B22/0046C04B28/04C04B2111/00155C04B2111/0075C04B2111/00775C04B2201/50C04B14/104C04B24/383C04B24/38Y02W30/30Y02W30/91
Inventor 宋军孔德勇车彤王宏武
Owner LIAONING HAITIANGE ENVIRONMENTAL PROTECTION TECH
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